CN204992584U - Digit reactor device based on PWM control technique - Google Patents
Digit reactor device based on PWM control technique Download PDFInfo
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- CN204992584U CN204992584U CN201520548430.7U CN201520548430U CN204992584U CN 204992584 U CN204992584 U CN 204992584U CN 201520548430 U CN201520548430 U CN 201520548430U CN 204992584 U CN204992584 U CN 204992584U
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- digital reactor
- pwm control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Power Conversion In General (AREA)
Abstract
<b>基于</b><b>PWM</b><b>控制技术的数字电抗器装置。供电系统电力线对电容效应的作用，系统产生较大的接地电容电流并引起电力线末端工频电压升高、空载切除电路引起操作过电压等现象，现今无源滤波装置由于各种干扰使电抗器和其串联的电容之间不能稳定达到谐振关系，从而不能很好的进行滤波。本实用新型的组成包括：触摸显示屏（</b><b>1</b><b>），所述的触摸显示屏与采样单元（</b><b>2</b><b>）连接，所述的采样单元与运算单元（</b><b>3</b><b>）连接，所述的运算单元与</b><b>PWM</b><b>控制单元（</b><b>4</b><b>）连接，所述的</b><b>PWM</b><b>控制单元与</b><b>IGBT</b><b>驱动单元（</b><b>5</b><b>）连接，所述的</b><b>IGBT</b><b>驱动单元与数字电抗器（</b><b>6</b><b>）连接，所述的数字电抗器与所述的触摸显示屏连接。本实用新型用于电力系统中的数字电抗器。</b>
<b>Digital reactor device based on </b><b>PWM</b><b> control technology. The effect of the power line of the power supply system on the capacitive effect, the system generates a large grounding capacitive current and causes the power frequency voltage at the end of the power line to rise, and the no-load cut-off circuit causes the operation overvoltage and other phenomena. Nowadays, the passive filter device has the reactor due to various interferences. The resonance relationship cannot be stably achieved between the capacitors connected in series with it, so filtering cannot be performed well. The composition of the utility model includes: a touch display screen (</b><b>1</b><b>), the touch display screen and a sampling unit (</b><b>2</b><b>) connection, the sampling unit is connected with the operation unit (</b><b>3</b><b>), the operation unit is connected with </b><b>PWM</b ><b>Control unit (</b><b>4</b><b>) connected, the </b><b>PWM</b><b>control unit with</b><b>IGBT</b><b> drive unit (</b><b>5</b><b>) connection, the </b><b>IGBT</b><b> The driving unit is connected with the digital reactor (</b><b>6</b><b>), and the digital reactor is connected with the touch screen. The utility model is used for a digital reactor in a power system. </b>
Description
technical field:
the utility model relates to a kind of digital reactor device based on PWM control technology.
background technology:
along with the extensive use of power electronic equipment in industrial circle, and a large amount of uses of power capacitor bank in electric power system, bring the sharply increase of harmonic component in operation of power networks, thus had a strong impact on the quality of power supply, jeopardize the safety in production of industrial enterprise and the Effective Operation of power department, make harmonic problem enjoy the concern of people.Therefore filtering harmonic wave, improve the vital task that the quality of power supply becomes power department.
electric power system power line is to the effect of capacity effect, and system produces larger earthing capacitance current and causes that power line end power-frequency voltage raises, unloaded cut-off circuit causes the phenomenons such as switching overvoltage, the stability of harm electric power system.Therefore power quality problem causes the extensive concern of current work about electric power person.Meanwhile, due to passive filtration unit now because various interference makes can not stablize between the electric capacity of reactor and its series connection to reach resonant relationship, thus well filtering can not be carried out.So, need the digital reactor adopting a kind of inductance adjustable to carry out reactive power compensation and filtering in electric power system.
utility model content:
the purpose of this utility model is to provide a kind of digital reactor device based on PWM control technology.
above-mentioned object is realized by following technical scheme:
a kind of digital reactor device based on PWM control technology, its composition comprises: touch display screen, described touch display screen is connected with sampling unit, described sampling unit is connected with arithmetic element, described arithmetic element is connected with PWM control unit, described PWM control unit is connected with IGBT driver element, described IGBT driver element is connected with digital reactor, described digital reactor is connected with described touch display screen, and described arithmetic element comprises direct voltage operation control module, offset current computing module, instruction current computing module.
the described digital reactor device based on PWM control technology, described digital reactor is made up of specified principal reactance, 10% induction regulation coil and IGBT inverter, described IGBT inverter.
the described digital reactor device based on PWM control technology, described IGBT inverter is connected with controller by optical fiber.
the beneficial effects of the utility model:
the utility model inputs current harmonics number of times and the size of current of required filtering by display screen, carry out process through signal processing circuit and obtain output order, actual output current is gathered again by sample circuit, carry out stagnant chain rate through signal processing circuit afterwards comparatively to produce PWM output signal and drive while the IGBT drive circuit that the many parallel circuits of signal give identical signal multiple parallel connection carries out IGBT, thus realize the output of electric current.
the utility model is to the filtering of each harmonic in electrical network and improves the quality of power supply, by CPLD auxiliary DSP as primary processor, be that the automatic control technology of core combines with the Driving technique of IGBT by DSP, design a set of can smoothly to export required perception according to system real-time running state idle, by controlling the inductance current of the inductance coil of secondary side inverter change own to offset earthing capacitance current as far as possible, reach the object of dynamic passive compensation, and the device of dynamic filter can be reached together with the electric capacity of its series connection, the touch-screen of Haitai that what the touch display screen of whole device was taked is gram, based on ARM exploitation touch display screen as man-machine data interaction, memory capacity is large, easy programming, handled easily, there is low-power consumption, cheap, the features such as stable performance, by software programming, it is designed, realize the input of harmonic current size and number of times and the display of measured current effective value and fault message.
the accurate output of the electric current that the utility model comparatively carries out based on the tracking and stagnant chain rate that realize electric current under DSP6713 chip; Adopt the high-precision hall transducer of the CHB type of Sen She electronics corporation, precision 0.5%.
accompanying drawing illustrates:
accompanying drawing 1 is system flow chart of the present utility model.
accompanying drawing 2 is system power signal acquisition circuit figure of the present utility model.
accompanying drawing 3 is system voltage signal acquisition circuit figure of the present utility model.
accompanying drawing 4 is direct voltage Acquisition Circuit figure of the present utility model.
accompanying drawing 5 is analog signal conditioner circuit diagrams of the present utility model.
accompanying drawing 6 is current output circuit figure of the present utility model.
accompanying drawing 7 is digital reactor schematic diagrames of the present utility model.
accompanying drawing 8 is certain harmonic branch road schematic diagrames of the present utility model
embodiment:
embodiment 1:
a kind of digital reactor device based on PWM control technology, its composition comprises: touch display screen 1, described touch display screen is connected with sampling unit 2, described sampling unit is connected with arithmetic element 3, described arithmetic element is connected with PWM control unit 4, described PWM control unit is connected with IGBT driver element 5, described IGBT driver element is connected with digital reactor 6, described digital reactor is connected with described touch display screen, described arithmetic element comprises direct voltage operation control module 7, offset current computing module 8, instruction current computing module 9.
embodiment 2:
the digital reactor device based on PWM control technology according to embodiment 1, described digital reactor is made up of specified principal reactance, 10% induction regulation coil and IGBT inverter, described IGBT inverter.
embodiment 3:
the digital reactor device based on PWM control technology according to embodiment 1 or 2, described IGBT inverter is connected with controller by optical fiber.
embodiment 4:
the digital reactor device based on PWM control technology according to embodiment 1, its implementation is: the first step, computing unit obtains harmonic number and the size of current of wanted filtering by the input of display screen, and carry out calculating generation instruction current, instruction current production method is, first make standard sinusoidal function value group SIN [500] be made up of 500 discrete points in dsp, discrete point is spaced apart 40us, then 500 points are just in time power frequency sinusoidal function.
second step, sampling unit is by gathering the signal of current transformer transmission, and send actual current value to calculation control unit, instruction current and measured current compare and produce PWM by calculation control unit, by optical fiber, signal are passed to controller.
3rd step, the IGBT driver element producing PWM ripple produces the driving pulse of driving power switching device by the comparison of measured current and instruction electric current.
4th step, IGBT driver element cut-offs by driving IGBT the output realizing electric current, if simultaneously IGBT runs into the fault such as short circuit, overvoltage and passes controller back by optical fiber, fault-signal carries out or computing by controller in CPLD, finally pass calculation control unit back, fault message, by judging, in case of all IGBT are turned off stopping fault by fault output low level signal, and is passed to the host computers such as display screen by serial ports output by control unit;
embodiment 5:
the digital reactor device based on PWM control technology according to embodiment 1 or 2, after sampling unit collects current signal, (in CPLD, a counter K is with the time that CPLD controls to sample, the crystal oscillator of CPLD is 25M, then its cycle is 40ns, K is from 0, each cycle K adds 1, reset when being 999 to K, complete in the meantime from the whole flow process sampling process be 40 μ s), receive the data of sampling, then write in the different addresses of dual port RAM, DSP selects signal to read sampled data from dual port RAM opposite side according to plate, and calculate the harmonic current needing to compensate, i.e. instruction current, again instruction current is write back dual port RAM, in CPLD, instruction current and measured current are carried out stagnant chain rate comparatively, produce pwm signal, control drive unit drives IGBT and produce the harmonic wave wanted.Overall structure is a closed-loop control.
Claims (3)
1. the digital reactor device based on PWM control technology, its composition comprises: touch display screen, it is characterized in that: described touch display screen is connected with sampling unit, described sampling unit is connected with arithmetic element, described arithmetic element is connected with PWM control unit, described PWM control unit is connected with IGBT driver element, described IGBT driver element is connected with digital reactor, described digital reactor is connected with described touch display screen, described arithmetic element comprises direct voltage operation control module, offset current computing module, instruction current computing module.
2. the digital reactor device based on PWM control technology according to claim 1, is characterized in that: described digital reactor is made up of specified principal reactance, 10% induction regulation coil and IGBT inverter, described IGBT inverter.
3. the digital reactor device based on PWM control technology according to claim 1 and 2, is characterized in that: described IGBT inverter is connected with controller by optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520548430.7U CN204992584U (en) | 2015-07-27 | 2015-07-27 | Digit reactor device based on PWM control technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520548430.7U CN204992584U (en) | 2015-07-27 | 2015-07-27 | Digit reactor device based on PWM control technique |
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| Publication Number | Publication Date |
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| CN204992584U true CN204992584U (en) | 2016-01-20 |
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| CN201520548430.7U Expired - Fee Related CN204992584U (en) | 2015-07-27 | 2015-07-27 | Digit reactor device based on PWM control technique |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193695A (en) * | 2018-10-25 | 2019-01-11 | 东北大学 | A kind of digital dynamic passive compensation reactor based on pulsewidth modulation |
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2015
- 2015-07-27 CN CN201520548430.7U patent/CN204992584U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193695A (en) * | 2018-10-25 | 2019-01-11 | 东北大学 | A kind of digital dynamic passive compensation reactor based on pulsewidth modulation |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20160727 |